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(3) An unknown charge placed at the origin exerts a downward force of 50 N on a +80 µC charge that is located at (0, 60 cm) relative to the origin.
(A) Calculate the electric field acting on the +80 µC charge.
B) What is the magnitude and the sign of the unknown charge?.
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(3) An unknown charge placed at the origin exerts a downward force of 50 N on a +80 µC charge that i...
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